package sword.T55;

import util.TreeNode;
import util.TreeUtil;

/**
 * @Author: 18362
 * @Create: 2022-04-10 0:46:41 星期日
 */
class E55_1 {
    public static void main(String[] args) {
        TreeNode root = TreeUtil.deserialize("[3,9,20,null,null,15,7]");
        System.out.println(new Solution().maxDepth(root));
    }
}
